Acer Aspire E1-521 Notebook Service Guide
Page 54
... features or options • Restore a BIOS when it becomes corrupted. See Creating a USB Flash Crisis Disk on page 2-28. • Do not install memory related drivers (XMS, EMS, DPMI) when BIOS Flash is used • Use an AC adapter power supply when running BIOS Flash utility. Prepare a bootable USB HDD/FDD...
... features or options • Restore a BIOS when it becomes corrupted. See Creating a USB Flash Crisis Disk on page 2-28. • Do not install memory related drivers (XMS, EMS, DPMI) when BIOS Flash is used • Use an AC adapter power supply when running BIOS Flash utility. Prepare a bootable USB HDD/FDD...
Acer Aspire E1-521 Notebook Service Guide
Page 86
... Manual for instructions on page 8-2. 4-5 Troubleshooting Reseat the memory modules. 12. Abnormal Video If the video appears abnormal, perform the following: 1. Roll back the video driver to its highest level. Remove and reinstall the video...
... Manual for instructions on page 8-2. 4-5 Troubleshooting Reseat the memory modules. 12. Abnormal Video If the video appears abnormal, perform the following: 1. Roll back the video driver to its highest level. Remove and reinstall the video...
Acer Aspire E1-521 Notebook Service Guide
Page 90
...OK Re-assemble the SPK cable to M/B Check Logic lower OK Swap M/B NG Swap Logic lower Figure 4:6. Remove and reinstall the audio driver. 5. Internal Speaker Failure If the internal speakers fail, perform the following : 1. Navigate to 50. Make sure that all volume controls are... > System > Device Manager. Confirm that other audio applications are set to the previous version. 4. If updated recently, roll back the audio driver to 50 and not muted. 4-9 Troubleshooting Boot the computer. 2. Check the Device Manager to determine that: • The device is properly ...
...OK Re-assemble the SPK cable to M/B Check Logic lower OK Swap M/B NG Swap Logic lower Figure 4:6. Remove and reinstall the audio driver. 5. Internal Speaker Failure If the internal speakers fail, perform the following : 1. Navigate to 50. Make sure that all volume controls are... > System > Device Manager. Confirm that other audio applications are set to the previous version. 4. If updated recently, roll back the audio driver to 50 and not muted. 4-9 Troubleshooting Boot the computer. 2. Check the Device Manager to determine that: • The device is properly ...